@JavierSanchis
Welcome to the forum
with some techniques we can retrieve some data. I did only a quick RnD:
with this extractMetadata
<extract>
<row exact="1">
<webctrl tag="tbody" idx="1"/>
<webctrl tag="tr"/>
</row>
<column exact="1" name="Column1" attr="text">
<webctrl tag="tbody" idx="1"/>
<webctrl tag="tr"/>
<webctrl tag="th" idx="1"/>
</column>
<column exact="1" name="Column2" attr="text">
<webctrl tag="tbody" idx="1"/>
<webctrl tag="tr"/>
<webctrl tag="td" idx="1"/>
</column>
</extract>
Otherwise with find children we have another option to work with.
However also have a look on mediawiki / Wikipedia API MediaWiki API help - Wikipedia as it has potential to get used as an alternate for content retrieval